jvb: add missing procps dependency

jvb/Dockerfile

@@ -2,7 +2,7 @@ FROM jitsi/base-java
 
 RUN \
 	apt-dpkg-wrap apt-get update && \
-	apt-dpkg-wrap apt-get install -y jitsi-videobridge && \
+	apt-dpkg-wrap apt-get install -y procps jitsi-videobridge && \
 	apt-cleanup
 
 COPY rootfs/ /